Javascript Map Programming Examples Last Updated : 16 Apr, 2025 Comments Improve Suggest changes Like Article Like Report A Javascript map is a collection of elements where each element is stored as a Key, value pair. Map objects can hold both objects and primitive values as either key or value. When we iterate over the map object it returns the key, and value pair in the same order as inserted.Javascript Map Programming ExamplesSyntax:let map = new Map([iterable]);Parameter: It is any iterable object whose values are stored as a key, or value pair, If the parameter is not specified then a new map is created as Empty.Example: Here is the basic example of a Javascript Map. JavaScript let map1 = new Map([ ["firstname", "Rohit"], ["lastname", "Sharma"], ["website", "geeksforgeeks"] ]); console.log(map1); Output:Map(3) {'firstname' => 'Rohit', 'lastname' => 'Sharma', 'website' => 'geeksforgeeks'}All the JavaScript map articles categoriez into three sections based on their difficulty levels: Easy, Medium, and Hard. This organization aims to help learners gradually progress from basic to more complex concepts.Easy:The Easy level includes articles that cover fundamental operations and straightforward tasks with JavaScript Maps.How to iterate over Map elements in JavaScriptHow to add a key-value pair to Map in JavaScriptHow to get the value by a key in JavaScript MapJavaScript program to update the value for a specific key in MapJavaScript program to get key by value in a MapHow to convert Map keys to an array in JavaScriptHow to convert a Map to JSON string in JavaScriptHow to convert a Map to array of objects in JavaScriptHow to convert Map to JSON in JavaScriptMap to array in JavaScriptHow to serialize a Map in JavaScriptMedium:The Medium level includes articles that delve deeper into working with JavaScript Maps, exploring more advanced operations and integrations with other data structures:How to convert an array of objects to a Map in JavaScriptHow to sort a Map in JavaScriptJavaScript program to split Map keys and values into separate arraysHow to convert a Map to Set in JavaScriptHow to convert a Set to Map in JavaScriptHow to call the map method only if the element is an arrayJavaScript program to combine values of two Maps having same keyHow to convert a plain object into ES6 Map using JavaScriptHard:The Hard level includes articles that cover more intricate and less common tasks How to recursively map object in JavaScriptHow to compute the average of an array after mapping each element to a value in JavaScriptHow to map array values without using map() method in JavaScriptHow are elements ordered in a Map in JavaScriptHow to convert Map to array in JavaScriptWe have a complete list of Javascript Map Programming, to check those, please go through this Javascript Map Complete Reference article.We have created a complete JavaScript Tutorial to help both beginners and experienced professionals. Please check this JavaScript Tutorial to get the complete content from basic syntax and data types to advanced topics such as object-oriented programming and DOM manipulation.We have created an article on JavaScript Examples and added a list of questions based on Array, Object, Function, …, etc. Please visit this JavaScript Examples to get a complete questions-based articles list of JavaScript.Recent articles on JavaScript Comment More infoAdvertise with us Next Article JavaScript Math Programming Examples V vishalkumar2204 Follow Improve Article Tags : JavaScript Web Technologies javascript-map Similar Reads JavaScript Programs JavaScript Programs contains a list of articles based on programming. This article contains a wide collection of programming articles based on Numbers, Maths, Arrays, Strings, etc., that are mostly asked in interviews.Table of ContentJavaScript Basic ProgramsJavaScript Number ProgramsJavaScript Math 13 min read JavaScript Array Examples JavaScript array is used to store multiple elements in a single variable. JavaScriptlet a = ["HTML", "CSS", "JS"] console.log(a)Output[ 'HTML', 'CSS', 'JS' ] Using New KeywordJavaScript// Declaring an array using Array Constructor let a = new Array(3) a[0] = "HTML" a[1] = "CSS" a[2] = "JS" console.l 3 min read Javascript Map Programming Examples A Javascript map is a collection of elements where each element is stored as a Key, value pair. Map objects can hold both objects and primitive values as either key or value. When we iterate over the map object it returns the key, and value pair in the same order as inserted.Javascript Map Programmi 3 min read JavaScript Math Programming Examples The JavaScript Math Object is used to perform mathematical operations on numbers. The Math object does not have a constructor. All properties and methods of Math are fixed/static. All properties and methods of Math are static and can be called by using Math as an object.JavaScript Math Programming E 2 min read JavaScript Number Programming Examples Javascript Numbers are primitive data types. Unlike other programming languages, Both integers and floating-point values are represented by JavaScript's number type. The IEEE-754 format is the one that is technically used by the JavaScript number type. Here, you don’t need int, float, etc, to declar 3 min read JavaScript Object Programming Examples JavaScript Object is the collection of properties and the property is in key, value pair format. These objects are quite different from JavaScript’s primitive data types (Number, String, Boolean, null, undefined, and symbol) in the sense that these primitive data types all store a single value each 6 min read JavaScript Set Programming Examples In JavaScript, the Set is a built-in collection that allows you to store unique values of any type, Set can store any type of value whether primitive or objects. It provides methods for adding, removing, and querying elements in an efficient way.JavaScriptlet s = new Set(["a", "b", "c"]); console.lo 1 min read JavaScript String Exercise JavaScript string is a primitive data type and is used for storing and manipulating a sequence of characters. It can contain zero or more characters within single or double quotes. This article contains a wide collection of JavaScript Programming examples based on String. JavaScriptlet s = "Geeksfor 7 min read Like